diff options
Diffstat (limited to 'src/grp-locale/systemd-localed/localed.c')
| -rw-r--r-- | src/grp-locale/systemd-localed/localed.c | 711 |
1 files changed, 711 insertions, 0 deletions
diff --git a/src/grp-locale/systemd-localed/localed.c b/src/grp-locale/systemd-localed/localed.c new file mode 100644 index 0000000000..e8a5eacbf4 --- /dev/null +++ b/src/grp-locale/systemd-localed/localed.c @@ -0,0 +1,711 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + Copyright 2013 Kay Sievers + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> +#include <unistd.h> + +#ifdef HAVE_XKBCOMMON +#include <dlfcn.h> +#include <xkbcommon/xkbcommon.h> +#endif + +#include <systemd/sd-bus.h> + +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-message.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/def.h" +#include "systemd-basic/locale-util.h" +#include "systemd-basic/macro.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/selinux-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/user-util.h" + +#include "keymap-util.h" + +static Hashmap *polkit_registry = NULL; + +static int locale_update_system_manager(Context *c, sd_bus *bus) { + _cleanup_free_ char **l_unset = NULL; + _cleanup_strv_free_ char **l_set = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; + sd_bus_error error = SD_BUS_ERROR_NULL; + unsigned c_set, c_unset, p; + int r; + + assert(bus); + + l_unset = new0(char*, _VARIABLE_LC_MAX); + if (!l_unset) + return -ENOMEM; + + l_set = new0(char*, _VARIABLE_LC_MAX); + if (!l_set) + return -ENOMEM; + + for (p = 0, c_set = 0, c_unset = 0; p < _VARIABLE_LC_MAX; p++) { + const char *name; + + name = locale_variable_to_string(p); + assert(name); + + if (isempty(c->locale[p])) + l_unset[c_set++] = (char*) name; + else { + char *s; + + if (asprintf(&s, "%s=%s", name, c->locale[p]) < 0) + return -ENOMEM; + + l_set[c_unset++] = s; + } + } + + assert(c_set + c_unset == _VARIABLE_LC_MAX); + r = sd_bus_message_new_method_call(bus, &m, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "UnsetAndSetEnvironment"); + if (r < 0) + return r; + + r = sd_bus_message_append_strv(m, l_unset); + if (r < 0) + return r; + + r = sd_bus_message_append_strv(m, l_set); + if (r < 0) + return r; + + r = sd_bus_call(bus, m, 0, &error, NULL); + if (r < 0) + log_error_errno(r, "Failed to update the manager environment: %m"); + + return 0; +} + +static int vconsole_reload(sd_bus *bus) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + int r; + + assert(bus); + + r = sd_bus_call_method(bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.systemd1.Manager", + "RestartUnit", + &error, + NULL, + "ss", "systemd-vconsole-setup.service", "replace"); + + if (r < 0) + log_error("Failed to issue method call: %s", bus_error_message(&error, -r)); + return r; +} + +static int vconsole_convert_to_x11_and_emit(Context *c, sd_bus *bus) { + int r; + + assert(bus); + + r = vconsole_convert_to_x11(c); + if (r <= 0) + return r; + + /* modified */ + r = x11_write_data(c); + if (r < 0) + return log_error_errno(r, "Failed to write X11 keyboard layout: %m"); + + sd_bus_emit_properties_changed(bus, + "/org/freedesktop/locale1", + "org.freedesktop.locale1", + "X11Layout", "X11Model", "X11Variant", "X11Options", NULL); + + return 1; +} + +static int x11_convert_to_vconsole_and_emit(Context *c, sd_bus *bus) { + int r; + + assert(bus); + + r = x11_convert_to_vconsole(c); + if (r <= 0) + return r; + + /* modified */ + r = vconsole_write_data(c); + if (r < 0) + log_error_errno(r, "Failed to save virtual console keymap: %m"); + + sd_bus_emit_properties_changed(bus, + "/org/freedesktop/locale1", + "org.freedesktop.locale1", + "VConsoleKeymap", "VConsoleKeymapToggle", NULL); + + return vconsole_reload(bus); +} + +static int property_get_locale( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Context *c = userdata; + _cleanup_strv_free_ char **l = NULL; + int p, q; + + l = new0(char*, _VARIABLE_LC_MAX+1); + if (!l) + return -ENOMEM; + + for (p = 0, q = 0; p < _VARIABLE_LC_MAX; p++) { + char *t; + const char *name; + + name = locale_variable_to_string(p); + assert(name); + + if (isempty(c->locale[p])) + continue; + + if (asprintf(&t, "%s=%s", name, c->locale[p]) < 0) + return -ENOMEM; + + l[q++] = t; + } + + return sd_bus_message_append_strv(reply, l); +} + +static int method_set_locale(sd_bus_message *m, void *userdata, sd_bus_error *error) { + Context *c = userdata; + _cleanup_strv_free_ char **l = NULL; + char **i; + const char *lang = NULL; + int interactive; + bool modified = false; + bool have[_VARIABLE_LC_MAX] = {}; + int p; + int r; + + assert(m); + assert(c); + + r = bus_message_read_strv_extend(m, &l); + if (r < 0) + return r; + + r = sd_bus_message_read_basic(m, 'b', &interactive); + if (r < 0) + return r; + + /* Check whether a variable changed and if it is valid */ + STRV_FOREACH(i, l) { + bool valid = false; + + for (p = 0; p < _VARIABLE_LC_MAX; p++) { + size_t k; + const char *name; + + name = locale_variable_to_string(p); + assert(name); + + k = strlen(name); + if (startswith(*i, name) && + (*i)[k] == '=' && + locale_is_valid((*i) + k + 1)) { + valid = true; + have[p] = true; + + if (p == VARIABLE_LANG) + lang = (*i) + k + 1; + + if (!streq_ptr(*i + k + 1, c->locale[p])) + modified = true; + + break; + } + } + + if (!valid) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid Locale data."); + } + + /* If LANG was specified, but not LANGUAGE, check if we should + * set it based on the language fallback table. */ + if (have[VARIABLE_LANG] && !have[VARIABLE_LANGUAGE]) { + _cleanup_free_ char *language = NULL; + + assert(lang); + + (void) find_language_fallback(lang, &language); + if (language) { + log_debug("Converted LANG=%s to LANGUAGE=%s", lang, language); + if (!streq_ptr(language, c->locale[VARIABLE_LANGUAGE])) { + r = strv_extendf(&l, "LANGUAGE=%s", language); + if (r < 0) + return r; + + have[VARIABLE_LANGUAGE] = true; + modified = true; + } + } + } + + /* Check whether a variable is unset */ + if (!modified) + for (p = 0; p < _VARIABLE_LC_MAX; p++) + if (!isempty(c->locale[p]) && !have[p]) { + modified = true; + break; + } + + if (modified) { + _cleanup_strv_free_ char **settings = NULL; + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.locale1.set-locale", + NULL, + interactive, + UID_INVALID, + &polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + STRV_FOREACH(i, l) + for (p = 0; p < _VARIABLE_LC_MAX; p++) { + size_t k; + const char *name; + + name = locale_variable_to_string(p); + assert(name); + + k = strlen(name); + if (startswith(*i, name) && (*i)[k] == '=') { + r = free_and_strdup(&c->locale[p], *i + k + 1); + if (r < 0) + return r; + break; + } + } + + for (p = 0; p < _VARIABLE_LC_MAX; p++) { + if (have[p]) + continue; + + c->locale[p] = mfree(c->locale[p]); + } + + locale_simplify(c); + + r = locale_write_data(c, &settings); + if (r < 0) { + log_error_errno(r, "Failed to set locale: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set locale: %m"); + } + + locale_update_system_manager(c, sd_bus_message_get_bus(m)); + + if (settings) { + _cleanup_free_ char *line; + + line = strv_join(settings, ", "); + log_info("Changed locale to %s.", strnull(line)); + } else + log_info("Changed locale to unset."); + + (void) sd_bus_emit_properties_changed( + sd_bus_message_get_bus(m), + "/org/freedesktop/locale1", + "org.freedesktop.locale1", + "Locale", NULL); + } else + log_debug("Locale settings were not modified."); + + + return sd_bus_reply_method_return(m, NULL); +} + +static int method_set_vc_keyboard(sd_bus_message *m, void *userdata, sd_bus_error *error) { + Context *c = userdata; + const char *keymap, *keymap_toggle; + int convert, interactive; + int r; + + assert(m); + assert(c); + + r = sd_bus_message_read(m, "ssbb", &keymap, &keymap_toggle, &convert, &interactive); + if (r < 0) + return r; + + keymap = empty_to_null(keymap); + keymap_toggle = empty_to_null(keymap_toggle); + + if (!streq_ptr(keymap, c->vc_keymap) || + !streq_ptr(keymap_toggle, c->vc_keymap_toggle)) { + + if ((keymap && (!filename_is_valid(keymap) || !string_is_safe(keymap))) || + (keymap_toggle && (!filename_is_valid(keymap_toggle) || !string_is_safe(keymap_toggle)))) + return sd_bus_error_set_errnof(error, -EINVAL, "Received invalid keymap data"); + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.locale1.set-keyboard", + NULL, + interactive, + UID_INVALID, + &polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + if (free_and_strdup(&c->vc_keymap, keymap) < 0 || + free_and_strdup(&c->vc_keymap_toggle, keymap_toggle) < 0) + return -ENOMEM; + + r = vconsole_write_data(c); + if (r < 0) { + log_error_errno(r, "Failed to set virtual console keymap: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set virtual console keymap: %m"); + } + + log_info("Changed virtual console keymap to '%s' toggle '%s'", + strempty(c->vc_keymap), strempty(c->vc_keymap_toggle)); + + r = vconsole_reload(sd_bus_message_get_bus(m)); + if (r < 0) + log_error_errno(r, "Failed to request keymap reload: %m"); + + (void) sd_bus_emit_properties_changed( + sd_bus_message_get_bus(m), + "/org/freedesktop/locale1", + "org.freedesktop.locale1", + "VConsoleKeymap", "VConsoleKeymapToggle", NULL); + + if (convert) { + r = vconsole_convert_to_x11_and_emit(c, sd_bus_message_get_bus(m)); + if (r < 0) + log_error_errno(r, "Failed to convert keymap data: %m"); + } + } + + return sd_bus_reply_method_return(m, NULL); +} + +#ifdef HAVE_XKBCOMMON + +_printf_(3, 0) +static void log_xkb(struct xkb_context *ctx, enum xkb_log_level lvl, const char *format, va_list args) { + const char *fmt; + + fmt = strjoina("libxkbcommon: ", format); + log_internalv(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, fmt, args); +} + +#define LOAD_SYMBOL(symbol, dl, name) \ + ({ \ + (symbol) = (typeof(symbol)) dlvsym((dl), (name), "V_0.5.0"); \ + (symbol) ? 0 : -EOPNOTSUPP; \ + }) + +static int verify_xkb_rmlvo(const char *model, const char *layout, const char *variant, const char *options) { + + /* We dlopen() the library in order to make the dependency soft. The library (and what it pulls in) is huge + * after all, hence let's support XKB maps when the library is around, and refuse otherwise. The function + * pointers to the shared library are below: */ + + struct xkb_context* (*symbol_xkb_context_new)(enum xkb_context_flags flags) = NULL; + void (*symbol_xkb_context_unref)(struct xkb_context *context) = NULL; + void (*symbol_xkb_context_set_log_fn)(struct xkb_context *context, void (*log_fn)(struct xkb_context *context, enum xkb_log_level level, const char *format, va_list args)) = NULL; + struct xkb_keymap* (*symbol_xkb_keymap_new_from_names)(struct xkb_context *context, const struct xkb_rule_names *names, enum xkb_keymap_compile_flags flags) = NULL; + void (*symbol_xkb_keymap_unref)(struct xkb_keymap *keymap) = NULL; + + const struct xkb_rule_names rmlvo = { + .model = model, + .layout = layout, + .variant = variant, + .options = options, + }; + struct xkb_context *ctx = NULL; + struct xkb_keymap *km = NULL; + void *dl; + int r; + + /* Compile keymap from RMLVO information to check out its validity */ + + dl = dlopen("libxkbcommon.so.0", RTLD_LAZY); + if (!dl) + return -EOPNOTSUPP; + + r = LOAD_SYMBOL(symbol_xkb_context_new, dl, "xkb_context_new"); + if (r < 0) + goto finish; + + r = LOAD_SYMBOL(symbol_xkb_context_unref, dl, "xkb_context_unref"); + if (r < 0) + goto finish; + + r = LOAD_SYMBOL(symbol_xkb_context_set_log_fn, dl, "xkb_context_set_log_fn"); + if (r < 0) + goto finish; + + r = LOAD_SYMBOL(symbol_xkb_keymap_new_from_names, dl, "xkb_keymap_new_from_names"); + if (r < 0) + goto finish; + + r = LOAD_SYMBOL(symbol_xkb_keymap_unref, dl, "xkb_keymap_unref"); + if (r < 0) + goto finish; + + ctx = symbol_xkb_context_new(XKB_CONTEXT_NO_ENVIRONMENT_NAMES); + if (!ctx) { + r = -ENOMEM; + goto finish; + } + + symbol_xkb_context_set_log_fn(ctx, log_xkb); + + km = symbol_xkb_keymap_new_from_names(ctx, &rmlvo, XKB_KEYMAP_COMPILE_NO_FLAGS); + if (!km) { + r = -EINVAL; + goto finish; + } + + r = 0; + +finish: + if (symbol_xkb_keymap_unref && km) + symbol_xkb_keymap_unref(km); + + if (symbol_xkb_context_unref && ctx) + symbol_xkb_context_unref(ctx); + + (void) dlclose(dl); + return r; +} + +#else + +static int verify_xkb_rmlvo(const char *model, const char *layout, const char *variant, const char *options) { + return 0; +} + +#endif + +static int method_set_x11_keyboard(sd_bus_message *m, void *userdata, sd_bus_error *error) { + Context *c = userdata; + const char *layout, *model, *variant, *options; + int convert, interactive; + int r; + + assert(m); + assert(c); + + r = sd_bus_message_read(m, "ssssbb", &layout, &model, &variant, &options, &convert, &interactive); + if (r < 0) + return r; + + layout = empty_to_null(layout); + model = empty_to_null(model); + variant = empty_to_null(variant); + options = empty_to_null(options); + + if (!streq_ptr(layout, c->x11_layout) || + !streq_ptr(model, c->x11_model) || + !streq_ptr(variant, c->x11_variant) || + !streq_ptr(options, c->x11_options)) { + + if ((layout && !string_is_safe(layout)) || + (model && !string_is_safe(model)) || + (variant && !string_is_safe(variant)) || + (options && !string_is_safe(options))) + return sd_bus_error_set_errnof(error, -EINVAL, "Received invalid keyboard data"); + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.locale1.set-keyboard", + NULL, + interactive, + UID_INVALID, + &polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = verify_xkb_rmlvo(model, layout, variant, options); + if (r < 0) { + log_error_errno(r, "Cannot compile XKB keymap for new x11 keyboard layout ('%s' / '%s' / '%s' / '%s'): %m", + strempty(model), strempty(layout), strempty(variant), strempty(options)); + + if (r == -EOPNOTSUPP) + return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Local keyboard configuration not supported on this system."); + + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Specified keymap cannot be compiled, refusing as invalid."); + } + + if (free_and_strdup(&c->x11_layout, layout) < 0 || + free_and_strdup(&c->x11_model, model) < 0 || + free_and_strdup(&c->x11_variant, variant) < 0 || + free_and_strdup(&c->x11_options, options) < 0) + return -ENOMEM; + + r = x11_write_data(c); + if (r < 0) { + log_error_errno(r, "Failed to set X11 keyboard layout: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set X11 keyboard layout: %m"); + } + + log_info("Changed X11 keyboard layout to '%s' model '%s' variant '%s' options '%s'", + strempty(c->x11_layout), + strempty(c->x11_model), + strempty(c->x11_variant), + strempty(c->x11_options)); + + (void) sd_bus_emit_properties_changed( + sd_bus_message_get_bus(m), + "/org/freedesktop/locale1", + "org.freedesktop.locale1", + "X11Layout", "X11Model", "X11Variant", "X11Options", NULL); + + if (convert) { + r = x11_convert_to_vconsole_and_emit(c, sd_bus_message_get_bus(m)); + if (r < 0) + log_error_errno(r, "Failed to convert keymap data: %m"); + } + } + + return sd_bus_reply_method_return(m, NULL); +} + +static const sd_bus_vtable locale_vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_PROPERTY("Locale", "as", property_get_locale, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("X11Layout", "s", NULL, offsetof(Context, x11_layout), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("X11Model", "s", NULL, offsetof(Context, x11_model), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("X11Variant", "s", NULL, offsetof(Context, x11_variant), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("X11Options", "s", NULL, offsetof(Context, x11_options), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("VConsoleKeymap", "s", NULL, offsetof(Context, vc_keymap), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("VConsoleKeymapToggle", "s", NULL, offsetof(Context, vc_keymap_toggle), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_METHOD("SetLocale", "asb", NULL, method_set_locale, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetVConsoleKeyboard", "ssbb", NULL, method_set_vc_keyboard, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetX11Keyboard", "ssssbb", NULL, method_set_x11_keyboard, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_VTABLE_END +}; + +static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) { + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int r; + + assert(c); + assert(event); + assert(_bus); + + r = sd_bus_default_system(&bus); + if (r < 0) + return log_error_errno(r, "Failed to get system bus connection: %m"); + + r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/locale1", "org.freedesktop.locale1", locale_vtable, c); + if (r < 0) + return log_error_errno(r, "Failed to register object: %m"); + + r = sd_bus_request_name(bus, "org.freedesktop.locale1", 0); + if (r < 0) + return log_error_errno(r, "Failed to register name: %m"); + + r = sd_bus_attach_event(bus, event, 0); + if (r < 0) + return log_error_errno(r, "Failed to attach bus to event loop: %m"); + + *_bus = bus; + bus = NULL; + + return 0; +} + +int main(int argc, char *argv[]) { + _cleanup_(context_free) Context context = {}; + _cleanup_(sd_event_unrefp) sd_event *event = NULL; + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int r; + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + mac_selinux_init(); + + if (argc != 1) { + log_error("This program takes no arguments."); + r = -EINVAL; + goto finish; + } + + r = sd_event_default(&event); + if (r < 0) { + log_error_errno(r, "Failed to allocate event loop: %m"); + goto finish; + } + + sd_event_set_watchdog(event, true); + + r = connect_bus(&context, event, &bus); + if (r < 0) + goto finish; + + r = context_read_data(&context); + if (r < 0) { + log_error_errno(r, "Failed to read locale data: %m"); + goto finish; + } + + r = bus_event_loop_with_idle(event, bus, "org.freedesktop.locale1", DEFAULT_EXIT_USEC, NULL, NULL); + if (r < 0) + log_error_errno(r, "Failed to run event loop: %m"); + +finish: + bus_verify_polkit_async_registry_free(polkit_registry); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |